to grasp a concept; to understand the logic of something; to see the point of a matter

(Chinese medicine) to clear or open the sensory orifices of the body, such as the eyes, ears, nose, or mouth

(of a creature, especially in mythology) to open or bore the physical apertures of the head (eyes, ears, nostrils, mouth), as in the story of 浑沌 hún​dùn in the Zhuangzi